Hibiki Sakura, a gluttonous high schooler, is questioned with her ever-expanding weight by her closest friend, Ayaka Uehara, during a frequent after-school grub crawl. Hibiki chooses to join the newly launched Silverman Gym after her attempts at alone workout fail terribly. Hibiki meets student council president and school idol Akemi Souryuuin at her orientation. However, Hibiki quickly discovers that she is in for a lot more than she bargained for. Not only is Silverman Gym teeming with world-class bodybuilders and athletes, but Akemi turns out to be a true muscle fetishist! Hibiki prepares to leave, disgusted by the sight unfolding before her eyes, only to be stopped by trainer Naruzou Machio. Hibiki is completely smitten with her unexpected Prince Charming.